Whenever we use the spa my ph goes up like crazy. A bright magenta color that is off the charts. Also free chlorine level drops considerably, sometimes to zero.
I have 3 kids 6-11 who spend quite a bit of time in there and probably pee a lot in there even though they have been told not to.
I also have a swg that is currently set to 5% for spa mode and an intelliph acid dispenser that shuts off when in spa mode.
I have 3" pipe running to the spa jets (8) and drains.
I have tried lowering the ph to around 7.2 just before turning on spa to compensate but doesn't appear to work.
Any thoughts, ideas?
TA has been pretty steady at about 110 since initial fill and water balance. New construction, first water in November 2014. I have attempted to bring TA down a few times but it seems to stay where it is.